Kali Linux Rolling 2016.1

OpenJDK is not recommended. There are a number of bugs (graphical glitches, CPU hogging, etc.) present with OpenJDK on Kali Linux Rolling.

Wayland is not recommended. Wayland is a replacement for X. Java may crash when the Cobalt Strike GUI is run on top of Wayland. Type echo $XDG_SESSION_TYPE to find out if you're on wayland or x11. To make x11 the default again, follow these steps.